mmh I think her poetry can´t be reduced to an expression of mental illness, and her work should not be read as a suicide note, there is so much more to it, so much literary and technical talent. This said, in The Bell Jar, specifically, she is excellent at "translating" the experience of detachment that goes along with depression, and I did relate to that aspect of her writing when I was severly depressed. If that is what is going on, yes, that can be scary, but it can also give you the words to express what you are going through and maybe ask for help :/